Mica-trimmer.



Ilo-888,197.

PATENTEDMAY 19, 1908.

E. G. SHEPHERD.

MICA TRIMMBR. APPLICATION FILED' sEPT.1e, 1907.

2 SHEETS-SHEET l.

PATENTED MAY 19, 1908.

E. G. SHEPHERD.

MICA TRIMMER.

APPLIGATION FILED SEPT. 1e. 1907.

2 SHEETS-SHEET 2.

071 AMW'.

im CL4/V5 HM /Utmnaqa UNITED STATES EDMUND G. SHEPHERD, OF

PATENT OFFTCE.l

OTTAWA, ONTARIO, CANADA.

MICA-TRIMMER.

Specification of Letters Patent.

Patented May 19, 1908.

To all whom 'it may concern:

Be it known that I, EDMUND GEORGE SHEPHERD, residing at Ottawa, in the county of Carleton, Province of Ontario, and Dominion of Canada, have invented new and useful Improvements in Mica-Trimmers, of which the following is a specification.

My invention which will be hereinafter fully set forth and claimed relates to machines for cutting or trimming the edges of mica plates.

The object of my invention is a machine for cutting or trimming the edges of plates of mica rapidly and with greater safety to the limbs, that works with a minimum of noise, removes the waste automatically and that can be produced at a low cost.

Figure 1 is a side view of my improved machine, partly in section. Fig. 2 is a plan of the same, partly in section. Fig. 3 is a detail on a larger scale, showing the knives, and being a section on line 3--3, Figs. 2 and 4. Fig. 4 is a front view of the same, part of the cover being broken out. Fig. 5 is a detail of the bearings. Fig. 6 is a perspective view of the machine, with part of the cover being broken out, and Fig. 7 shows the disk with cover4 in rear view, parts being broken out.

Upon a base plate, A, Figs. 1 and 2, are two standards, a, preferably cast integrally therewith, the tops of which are formed into bearings, a1, having vertical bolting lugs, a2, cast solid therewith in one piece and after- Wards slotted open along the lin'c 2, Fig. 2, and held together by the bolts, a3.

The front of the base plate is formed. with a vertical plate, A1, also preferably cast integrally therewith and having its upper edge rabbeted on the inside to receive a knife blade, B, held in position by screws or bolts, B1. In the bearings al is journaled a shaft, C, carrying a fast and loose pulley, D D1, be tween said bearings and having mounted at the end a disk, E.

Thel disk E presents a flat face. and is formed with a rim, e, to act as a Afly wheel. A wide and shallow groove 3, extends across v its face through the center, to form a seat the Waste cuttings to pass freely for a knife, El, bolted into it, (by screws E01) slightly on the slant, so that its cutting edge projects 'a little, as shown in Fig. 3. Coin cident with the cutting edge is a slot, 4, in the web of the disk, its lips beveled so as to be 'flaring towards the interior and allowing The interior of the disk is fitted withvanes, E2, projecting beyond the rim in width and short towards the center, to form a fan blower for ejecting the waste.

The stationary knife B is set on the knife support A1 with a slight bevel, so that the cutting edge projects towards the disk E, as shown in Fig. 3, about level with the center of the disk.

The disk E is completely surrounded by a' cover, F, formed in the shape of a fan casing, with an intake, 5, near the hub of the disk and a discharge chute, f, below and at one end, a slit, 6, being made in it opposite the cutting edge of the stationary knife, for the insertion of the mica plate for operation. It is made wider than the thickness of the diskrim e calls for, the vanes E2 extending into the wider part and the discharge f is formed in the latter part. It may be secured to the stationary knife support, A1, (which, as shown, acts as part of the cover) or to any other convenient stationary part.

The cover F, it will be noticed, while forming a protection against accidental contact with the rotatory cutters, also forms part of a device for removing the Waste, thus preventing accumulation within the machine and keeping the atmosphere of the room in which it works in a more healthy condition.

I claim as my invention:

1. In a mica trimmer, the combination with a base plate of standards with bearings, a shaft journaled in said bearings, fast and loose pulleys upon said shaft between said bearings, a rimmed disk mounted upon the end of said shaft, knife blades radially disposed on and partly recessed into the face of said disk and over slots in the web of the same, a stationary knife support on said base-plate facing said disk, a knife blade bolted to said support and set close to the cutting edges of the knives in the disk, a cover surrounding said disk and formed in the shape of a fan casing with air inlet and discharge chute and vanes on the rear of the disk to form a blower, substantially as set forth.

2. In a mica trimmer, the combination with a base plate of a pair of standards with bearings, a shaft journaled in said bearings, fast and loose pulleys mounted upon said shaft between said bearings, a llat-faced rimmed fly wheel disk mounted rigidly upon the end of said shaft and having Vslots in the web extending radially across lthe face, a

knife-blade adjacent to each slot and partly of the knife in the disk, substantially as deextending into said slot and nearly Wholly scribed. 10 recessed into said face, a stationary knife In testimony whereof I aix my signature, support on said base plate rising approxiin presence of two subscribing Witnesses.

mately to the center and near the face of the E. G. SHEPHERD. disk and extending from the center to the Witnesses: rim on one side and a knife blade secured to A. HARVEY,

said support and set close to the cutting edge I M. HELEM. 

